I have a koss mp3 digital player & i do not have any instructions, so i am not sure how to use it

Try disconnect everything including power supply. Remove any batterys if any. Give it time to hopefully reset itself.

Take a look at the inputs on the DVD player. If it has an AUX input (looks like a headphone jack) you may be able to connect with a male to male 3.5mm headphone jack. Otherwise you could use a converter that goes from headphone jack to RCA (Red, White, Yellow)

You need to change to sound setting on your amp to 'multi channel in' or dts, depending on what you are trying to watch. Also make sure all speakers are polarised correclty ie +/+ -/-.

You can get the manual from here:

http://www.koss.com/koss/kossweb.nsf/csfapm?OpenForm&Seq=1

You simply select QZ900 and the instruction can be seen.
I hope this downloaded document will be usable for you.
Thanks.
gylacz

need a remote and an owners manual for this unit

You need to use the Sony driver to transfer MP3 files to your player. You can download the driver from
http://esupport.sony.com/US/perl/swu-download.pl?template=&upd_id=1936&os_id=3,4,6,7,16&mdl=NWE507
Please read the instructions before you install the driver.
Please make sure to rate this solution. Thanks.

http://www.universalremote.com/resources/pdfs/wr7_manual.pdf

You Can By A Universal Remote At Any Wal-mart, Rite Aid,Radio Shack And Program It To Your T.v.
If You Are Wanting An Exact Replacement Let Me Know And Ill Find You One.
Thanks For Using Fixya.com
Sincerely,
Michael Scott

Hey
I was checking around for you and you can get an orignal replacement remote for your unit at www.remotes.com
Please take a second out to rate my answer!
THANK YOU!

thats mean your device needs a newUpgrade Firmware.
You can dowload it from main support area of your product.